882999-65-7Relevant academic research and scientific papers
Copper/B2pin2-catalyzed C-H difluoroacetylation-cycloamidation of anilines leading to the formation of 3,3-difluoro-2-oxindoles
Ke, Miaolin,Song, Qiuling
, p. 2222 - 2225 (2017/02/23)
An original and efficient synthesis of 3,3-difluoro-2-oxindole derivatives has been developed via copper/B2pin2-catalyzed difluoroacetylation of aniline via C-H activation followed by intramolecular amidation. In this method, amino groups in primary, secondary or tertiary anilines act as directing groups, providing ortho-difluoroacetylated products regioselectively. And in the first two cases, further intramolecular amidation affords 3,3-difluoro-2-oxindole derivatives via a one-pot strategy. This method facilitates the synthesis of compound A as a potent and selective EP3 receptor antagonist in only five steps in 13% yield instead of the previously reported nine steps in overall 4% yield.
Sulfonamide peri-substituted bicyclics for occlusive artery disease
-
Page/Page column 59-60, (2008/06/13)
Acyl sulfonamide, peri-substituted, fused bicyclic ring compounds useful for the treatment or prophylaxis of a prostaglandin-mediated disease or condition are disclosed. The compounds are of the general formula A representative example is:
CARBOXYLIC ACID PERI - SUBSTITUTED BICYCLICS FOR OCCLUSIVE ARTERY DISEASE
-
Page/Page column 110-111, (2010/11/08)
Peri-substituted, fused bicyclic ring carboxylic acids useful for the treatment or prophylaxis of a prostaglandin-mediated disease or condition are disclosed.
